| Date |
Text |
| 2020-12-02 09:32:02 | THE FOLLOWING COMMENTS ARE BASED ON THE REVIEW OF THE |
| | 10/16/2020 DISTRIBUTED PACKAGE. |
| | |
| | 1. RELOCATE DRAINAGE STRUCTURE NO. NO. 3 OUT OF THE |
| | PROPOSED RIGHT OF WAY. |
| | |
| | 2. WEST INVERT ELEVATION AT STRUCTURE NO. 3 LABELED AS |
| | EAST INVERT. |
| | |
| | 3. ADD A WEIR TO THE WEST INVERT ELEVATON OF STRUCTURE |
| | NO. 3 AND LOWER THE WEST INVERT ELEVATON OF STRUCTURE |
| | NO. 2 TO ALLOW ROOF DRAINAGE TO FLOW TOWARD THE |
| | EXFILTRATION TRENCH FOR TREATMENT AND PEAK FLOW |
| | ATTENUATION. |
| | |
| | 4. ADD A PRB TO STRUCTURE NO. 1 TO EXTEND THE LIFE OF |
| | THE EXFILTRATION TRENCH. |
| | |
| | 5. SURVEY VERTICAL DATUM IS LISTED AS NAVD1988. THE |
| | CIVIL ENGINEERING PLANS LIST THE VERTICAL DATUM AS |
| | NGVD1929 ALTHOUGH THEY SHOW THE SAME VALUE FOR EXISTING |
| | SPOT GRADES AS THE SURVEY. THE VERTICAL DATUM SHALL BE |
| | CONSISTENT FOR ALL OF THE PLANS. THE CITY'S OFFICIAL |
| | VERTICAL DATUM IS NGVD1929 BUT HAS ALLOWED THE USE OF |
| | NAVD1988 PROVIDED THE CONVERSION BETWEEN THE TWO DATUMS |
| | IS LISTED ALONG WITH THE VERTICAL DATUM ON EVERY SHEET |
| | WITH ELEVATION INFORMATION. |
| | |
| | 6. DRAINAGE REPORT: |
| | A. THE PROPOSED CONDITIONS CASCADE MODEL RESULTS SHOW |
| | DISCHARGE WHEN THE HEADWATER STAGE IS LOWER THAN THE |
| | UPSTREAM PIPE INVERT ELEVATION. |
| | |
| | B. THE EXISTING CONDITIONS CACADE MODEL RESULTS FOR THE |
| | 5-YEAR EVENT SHOW CONSTANT CURRENT DISCHARGE OF 18.46 |
| | CFS. |
| | |
| | TRACY WARD, PE |
| | SENIOR STORMWATER ENGINEER |
| | ENGINEERING SERVICES DEPARTMENT |
| | 561-494-1120 (O) |
| | 561-351-0510 (M) |
| | [email protected] |
| | |
| |
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